Revert "Merge the remote 7.x-3.x, most of which I really don&#039;t want anymore, just so I can revert it later, since apparently D.o&#039;s Git repos don&#039;t support git push --force. :/"
This reverts commit dd4d2b6fe8ce9bc0446f1f25a35529bf732ecd39, reversing
changes made to b1956a02383f0ebbe1e61d16e3fdc3cd360cccd9.

Change the way tests work; test by building a format with a Pathologic instance and running text through that with check_markup() rather than running it through the Pathologic filter callback function directly.